Compound sintering alloy, steel support component null inside heatproof component and

摘要

PURPOSE:To manufacture the composite sintered alloy having excellent high temp. strength and oxidation resistance, etc., by preparing a sintered body having a uniform mixed structure from rare earth oxide grains and an Fe-Cr alloy having a specified amt. of Fe. CONSTITUTION:The grains of rare earth oxide (the oxide of Y, La, Ce, Nd, etc., or their double oxide, etc., having about 1 to 10mu grain size) and an Fe-Cr alloy contg. 5 to 50wt.% Fe are mixed in a prescribed ratio, which is subjected to hot isostatic pressing to manufacture a sintered body having a uniform mixed structure. In this way, the composite sintered alloy having high denseness and soundness and free from pinholes, cracks, etc., can be obtd., which is useful as a steel material supporting member such as a skid button in a heating furnace.